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include/uapi/linux/igmp.h 2.89 KB
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607ca46e9   David Howells   UAPI: (Scripted) ... 
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  /*
   *	Linux NET3:	Internet Group Management Protocol  [IGMP]
   *
   *	Authors:
   *		Alan Cox <alan@lxorguk.ukuu.org.uk>
   *
   *	Extended to talk the BSD extended IGMP protocol of mrouted 3.6
   *
   *
   *	This program is free software; you can redistribute it and/or
   *	modify it under the terms of the GNU General Public License
   *	as published by the Free Software Foundation; either version
   *	2 of the License, or (at your option) any later version.
   */
  
  #ifndef _UAPI_LINUX_IGMP_H
  #define _UAPI_LINUX_IGMP_H
  
  #include <linux/types.h>
  #include <asm/byteorder.h>
  
  /*
   *	IGMP protocol structures
   */
  
  /*
   *	Header in on cable format
   */
  
  struct igmphdr {
  	__u8 type;
  	__u8 code;		/* For newer IGMP */
  	__sum16 csum;
  	__be32 group;
  };
  
  /* V3 group record types [grec_type] */
  #define IGMPV3_MODE_IS_INCLUDE		1
  #define IGMPV3_MODE_IS_EXCLUDE		2
  #define IGMPV3_CHANGE_TO_INCLUDE	3
  #define IGMPV3_CHANGE_TO_EXCLUDE	4
  #define IGMPV3_ALLOW_NEW_SOURCES	5
  #define IGMPV3_BLOCK_OLD_SOURCES	6
  
  struct igmpv3_grec {
  	__u8	grec_type;
  	__u8	grec_auxwords;
  	__be16	grec_nsrcs;
  	__be32	grec_mca;
  	__be32	grec_src[0];
  };
  
  struct igmpv3_report {
  	__u8 type;
  	__u8 resv1;
  	__be16 csum;
  	__be16 resv2;
  	__be16 ngrec;
  	struct igmpv3_grec grec[0];
  };
  
  struct igmpv3_query {
  	__u8 type;
  	__u8 code;
  	__be16 csum;
  	__be32 group;
  #if defined(__LITTLE_ENDIAN_BITFIELD)
  	__u8 qrv:3,
  	     suppress:1,
  	     resv:4;
  #elif defined(__BIG_ENDIAN_BITFIELD)
  	__u8 resv:4,
  	     suppress:1,
  	     qrv:3;
  #else
  #error "Please fix <asm/byteorder.h>"
  #endif
  	__u8 qqic;
  	__be16 nsrcs;
  	__be32 srcs[0];
  };
  
  #define IGMP_HOST_MEMBERSHIP_QUERY	0x11	/* From RFC1112 */
  #define IGMP_HOST_MEMBERSHIP_REPORT	0x12	/* Ditto */
  #define IGMP_DVMRP			0x13	/* DVMRP routing */
  #define IGMP_PIM			0x14	/* PIM routing */
  #define IGMP_TRACE			0x15
  #define IGMPV2_HOST_MEMBERSHIP_REPORT	0x16	/* V2 version of 0x12 */
  #define IGMP_HOST_LEAVE_MESSAGE 	0x17
  #define IGMPV3_HOST_MEMBERSHIP_REPORT	0x22	/* V3 version of 0x12 */
  
  #define IGMP_MTRACE_RESP		0x1e
  #define IGMP_MTRACE			0x1f
  
  
  /*
   *	Use the BSD names for these for compatibility
   */
  
  #define IGMP_DELAYING_MEMBER		0x01
  #define IGMP_IDLE_MEMBER		0x02
  #define IGMP_LAZY_MEMBER		0x03
  #define IGMP_SLEEPING_MEMBER		0x04
  #define IGMP_AWAKENING_MEMBER		0x05
  
  #define IGMP_MINLEN			8
  
  #define IGMP_MAX_HOST_REPORT_DELAY	10	/* max delay for response to */
  						/* query (in seconds)	*/
  
  #define IGMP_TIMER_SCALE		10	/* denotes that the igmphdr->timer field */
  						/* specifies time in 10th of seconds	 */
  
  #define IGMP_AGE_THRESHOLD		400	/* If this host don't hear any IGMP V1	*/
  						/* message in this period of time,	*/
  						/* revert to IGMP v2 router.		*/
  
  #define IGMP_ALL_HOSTS		htonl(0xE0000001L)
  #define IGMP_ALL_ROUTER 	htonl(0xE0000002L)
  #define IGMPV3_ALL_MCR	 	htonl(0xE0000016L)
  #define IGMP_LOCAL_GROUP	htonl(0xE0000000L)
  #define IGMP_LOCAL_GROUP_MASK	htonl(0xFFFFFF00L)
  
  /*
   * struct for keeping the multicast list in
   */
  
  #endif /* _UAPI_LINUX_IGMP_H */